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Three Labour backbench AMs have attacked the announcement of an M4 relief motorway,. They were unhappy with either the decision itself or the timing of Edwina Hart's statement.

Pontypridd AM Mick Antoniw and Cardiff North's Julie Morgan are both members of the Assembly Environment Committee. They were unhappy that the minister had not waited for their committee's report on the proposal and had not even agreed to appear before them.

The minister replied that she could not not appear before the committee until she had taken her decision for fear of a legal challenge on the grounds that she had not acted impartially. Mr Antoniw, who's a lawyer warned that the minister had in fact left herself open to a legal challenge by her actions.

Cardiff Central Labour AM Jenny Rathbone argued that new roads inevitably generate more traffic and said her constituents would be disappointed by the decision.